664235463 has 4 divisors (see below), whose sum is σ = 885647288. Its totient is φ = 442823640.

The previous prime is 664235449. The next prime is 664235477. The reversal of 664235463 is 364532466.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (664235449) and next prime (664235477).

It is not a de Polignac number, because 664235463 - 2⁴ = 664235447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664235413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110705908 + ... + 110705913.

It is an arithmetic number, because the mean of its divisors is an integer number (221411822).

Almost surely, 2^664235463 is an apocalyptic number.

664235463 is a deficient number, since it is larger than the sum of its proper divisors (221411825).

664235463 is a wasteful number, since it uses less digits than its factorization.

664235463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221411824.

The product of its digits is 311040, while the sum is 39.

The square root of 664235463 is about 25772.7659167579. The cubic root of 664235463 is about 872.5172452209.

The spelling of 664235463 in words is "six hundred sixty-four million, two hundred thirty-five thousand, four hundred sixty-three".